The 2100s (special) has the same cover, and the Super 2100 with the 3/4 clutch. The cover thats different is the Super 2100 with the 7/8 clutch, it will technically fit but be incorrect, and its even harder to find.
Thanks a bunch! I got a nibble in the "Wanted to buy" thread today, so hopefully my search is done!
The 2000 that I have is well-used, but still has 170 psi compression.